Dipper for excavating machines



July 14, 1925. 1,545,621

G. TURNER DIPPER FOR EXCAVATING MACHINES Filed Deg. 26, 1924 2 sheets-she 1 Jkrzufrn July 14, 1925. 1,545,621

G. E. TURNER DIPPER FOR EXCAVATING MACHINES Filed Dec. 26, 1924 I -2 Sheets-Sheet 52 v I V |||lIIl 61m un s Patented July 14, 1925. UNITED 'STATES 1,545,621 PATENT ounce.

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DIPPEB FOR EXCAVATING MACHINES Application filed December 26, 192.4. Serial No. 758,063.

To all whom a may concern:

Be it known that I, Gnome E. TURNER, a citizen of the United States, residing at New Lexington, in the countyof Perry and State of Ohio, have invented certain new and useful Improvements in Dippers for Excavating Machines, o f which the following is a specification.

This improvement relates to an improved dipper ,for excavating purposes and preferably relates to the dippers employed by steam shovels, particularly the largesize shovels used for stripping coal and similar uses. Heretofore great difliculty has been encountered by reason of the front wall of the dipper breaking or cracking and if the wall was made thick enough and heavy enough to support the plows, the proper heat treatment of the metal of the wall could not be made. In other instances where the wall was not made thick or heavy, the plows were necessarily supported above the front wall and in that event there was great difiiculty encounteredwith the clogging of the dirt at the mouth of the bucket.

This improvement is intended to overcome the foregoing objections and the front wall is formed of such a character, and the fastenings for the plow or point securing same to the ,front wall are of such character as to avoid the objections set forth above. In a general way, the front wall may be said to be made in two partsan upper and a lower plate-and these upper and lower plates are braced by longitudinal supporting walls, and the fastening device is so ar-' ranged as to dispense with rivets and openings through the front wall.

Referring to the drawings, Fig. '1 is a side elevation of an ordinary dipper of the character used with steam shovel excavating machines. Fig. 2 is a bottom plan view of the dipper. Fig. 3 is a sectional view on the line 3-3 of Fig. 1. Fig. 4 is a sectional view on the line 4- of Fig. 3, and Fig. 5 is a sectional view on the line -5--5 of Fig. 3. Fig. 6 is a sectional view on the line 6-6 of Fig. 4 and Fig. 7 is a detail View of the plow or point.

' This invention is concerned particularly with the top part of the front of the dipper as it appears in Fig. 1. The dipper is formed of a front and a rear part marked respectively 2 and 3. These two parts 2 and 3 are riveted together near the center of the bucket, and consequently, when the front is to be removed, it is only necessary to separate the front from the rear.

Throughout this specification the part termed the front is that shown atthe bottom of Fig. 1, and the rear is at the oposite side, while the top is the part at the eft of that figure, and the bottom at the right of Fig. 1.

The front plate of the front is indicated by 6 and the. rear plate is indicated by 5 (see Fig. 3). These two plates are braced or tied together by longitudinal supporting walls 7 (see Figs. 5 and 3). These two walls 5 and 6 are spaced apart below the top of the wall, but at the cutting edge the two walls converge to form a supporting portion on which are cast a plurality of nose shaped projecting parts 8 (Figs. 4, 5 and 6), and there is a nose shaped part for each plow or point. This nose shaped piece is formed with a slot as indicated in Fig. 8, and the central part of that slot is bored to receive the tongue or web of the plow as explained more fully hereafter. The tool is usually called a plow because it is shaped like a plow and Fig. 7 shows the formation of the tongue or web indicated by 9, the plow being indicated by 13, and this web is formed with a central boss 10, with a longitudinal opening 11, and a slot12.

In assembling the point or plow upon the nose shaped piece of the front wall, the web 9 is slipped within the slot formed in said nose shaped piece and the central bored opening of the slotted portion of the nose encircles the central boss 10 of the plowor point, as clearly shown in Fig. 6, and thereby the plow or point is braced against lateral movement by the contacting walls of the nose shaped piece. Before the plow or point is attached to the nose shaped piece a bolt is placed within the opening 11 and a nut115 held within the slot 12. is secured to the end of the bolt. so as to hold the bolt 14 securely fastened to the tongue of the plow. The upwardly projecting portion of the bolt 14 will then extend into a space formed in the front above the plates 5 and 6 as indicated clearly in Fig. 5, so that by inserting the web 19 within the slotted portion of the nose shaped piece the bolt will also be rojected up within that space formed a vs the front and rear plates and the upper end of the bolt is thereby arranged to be secured at a point where the front and rear plates .converge together. I The nuts for securing the upper end of that bolt, marked 16 and 17 are preferably located in a pocket formed in the part of-the front wall projecting above the plates, and in this way the plow or point is securely fastened to the projecting part of the front wall without weakening it, and Whenever it is necessary to remove a plow or point, the nuts 16 and 17 are removed and the plow then withdrawn, the bolt 14: being removed from the tongue by unscrewing same from the nut 15.

It is therefore manifest that by my im proved arrangement the plow is dropped entirely outside of the .inside line of the mouth of the dipper so as. to avoid any possibility of the mouth becoming obstructed by any projecting part that would interfere with the free passage of the dirt into and through the dipper, and the front wall being formed by two plates securely braced by the longitudinal walls form an. adequate support for the plow, having great rigidity and strength, dispensing with the necessity of employing at that point a heavy plate which is aptto break or crack, when the plow is subjected to the great strains incident to the use of a dipper for coal mining and other purposes.

Having described the invention, I claim as followsi 1. In an excavating dipper, the combinaton of a plurality of platesspaced apart to form one part of a front wall, braces connecting the plates to reinforce same, wherebya trussed part is formed, an unbroken wall projecting beyond I, said trussed part, having a plurality of pockets formed in its projecting end, plow teeth formed with tongues capable of being enclosed by said pockets and means for securing said tongues within said pockets.

2. /In an excavating dipper, the combination of a plurality of plates spaced apart to form a ront wall for said-dipper, braces connecting said plates forming a trussed member an unbroken sup ortin wall projecting beyond the trussed memier having pockets therein formed in vertical alignment with said braces, plow points and means for fastening same to said supporting wall whereby the rear side of the point will lie below the inside of. the dipper and the front side of the point will lie substantially in line with the front side of said trussed member.

3. In an excavating dipper, the combination of a front wall formed of a plurality of plates spaced apart but braced together, said plates converging together at the cutting end with a nose Shaped casting extendin therefrom, plows located at the upper en of said front, web shaped walls secured to said plows, bolts extending longitudinally through said nose shaped castings and held within the said web shaped walls. 4. In an excavating dipper, the combination of a front wall for'said dipper formed of two plates spaced apart but converging together at the upper end, supporting walls connecting said plates, plows secured to the upper end of said front wall extending entirely outside of the opening for the dipper,

. longitudinal walls between the base and the top of the plow having a longitudinal opening and a slot formed in said walls, a bolt extending longitudinally through the open ing in said wall, 'means for securing the lower end of said bolt'to the front wall and meanslocated in said slot for securing the bolt to said longitudinal wall.

In testimony whereof, I have hereunto set :ilnyihand this 20th day of December, A. D.

GEORGE E. TURNER. 

